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Pre-algebra
Arithmetics
Ordering natural numbers
Addition
Subtraction
Multiplication
Division
Order of operations
Signed numbers
Opposite and absolute value
Addition
Subtraction
Multiplication
Division
Order of operations
LCM and GCF
Divisibility
Prime numbers
Factoring
Multiples
Tests of divisibility
Prime factorization
GCF
LCM
Decimals
Addition
Subtraction
Multiplication
Division
Fractions
Equivalent fractions
Reducing fractions
Reducing to least common denominator
Comparing fractions
Adding and subtracting fractions
Multiply fractions
Divide fractions
Multiple operations
Exponents
Multplication properties
Division properties
Power of a power
Percentages
Calculate the % of a number
Determine the %
Percentage increases
Percentage decreases
Calculate the inital capital
Proportional reasoning
Ratio & proportion
Direct proportion
Inverse proportion
Mixture problems
Uniform motion problems
Equal shares
Radical expressions
Adding and subtracting
Rationalizing
Radical equation
Graphs
Plotting points and naming quadrants
Definition of slope
Positive or negative slope
Algebra
Monomials
Addition
Subtraction
Multiplication
Division
Polynomials
Polynomial Vocabulary
Addition
Subtraction
Multiplication (FOIL)
Multiplication
Special products
Long division
Synthetic division
Remainder theorem
Roots and factors
Polynomial Function
Factoring
Factoring
Factoring Trinomials a=1
Factoring trinomials a not equal to 1
Difference of Perfect Squares
Perfect Trinomial Squares
Factoring by grouping
Factoring the Sum or Difference of Cubes
Factoring Complicated Expressions
Solving equations by Factoring
Linear Equations
Solving equations
Equations with parentheses
Equations with parentheses
Radical equations
Word problems
Mixture problems
Time and distance problems
Equal shares
Graphs of linear equations
Rectangular Coordinate System
Midpoint Formula
Definition of Slope
Positive and negative slope
Determine the slope of a line
Equations of lines
Slope-Intercept Form
Point-Slope Form
Standard Form
Equation of lines (from graph)
Applications of linear equations
Inequalities
Linear inequalities
Multistep inequalities I
Multistep inequalities II
Quadratic equations
Quadratic formula
Solve factoring
Solve completing the square
Incomplete quadratic equation
The discriminant
Applications
Quadratic function
Equations in quadratic form
Graphs of quadratic equations
Exploring Quadratic Graphs
Graphing Quadratic Equations
Using a table to graph a Quadratic Equation
Vertical and Horizontal Shifts of Quadratic Graphs
Vertical Stretching and Shrinking of Quadratic Graphs
Vertex and Intercepts of a Quadratic Graph
Applications
Absolute Value
Definition
Absolute Value Equations
Absolute Value Inequalities
Absolute Value Graphs
Radical expressions
Adding and subtracting
Rationalizing
Radical equations
Exponential equations
Logarithmic equations
System of equations
Introduction
Substitution
Elimination
Graphing
Using the augmented matrix
Using the inverse matrix
Word problems
System of 3 variables
Graphs and functions
Plotting points and naming quadrants
Interpreting Graphs
Relations and Functions
Function Notation
Writing a Linear Equation from a Table
Writing a Linear Equation to describe a Graph
Direct Variation
Indirect Variation
Domain and range
Definitions
Polynomial function
Rational function
Radical function
Trigonometric function I
Trigonometric function II
Trigonometric function III
Sequences and series
Introduction to sequences
Series and Summation Notation
Arithmetic sequences
Arithmetic series
Geometric sequences
Geometric series
Recursion Sequence
Matrices
Concept of matrix
Definitions
Addition and subtraction
Multiplication
Multiplication properties
Elemento sin tÃtulo
Solve linear systems (augmented matrix)
Solve linear system (inverse matrix method)
Matrix equations
Inverse of a matrix
Determinants
Inner product
Geometry
Triangles
Triangle
Triangle angle sum
Isosceles Triangle
Triangle Side Inequality
Side and Angle Inequalities
Remote Interior Angles
SSS and SAS
ASA and AAS
HL
CPCTC
Isosceles Triangle Property
Polygons
Interior Angles Sum
Equiangular Polygon Sums
Exterior Angles
Kite Properties
Triangle Midsegment
Trapezoid Midsegment
Parallelogram Properties
Rhombus Properties
Rectangle Properties
Square Properties
2-D Shapes
Triangle
Square
Rectangle
Rhombus
Trapezoid
Parallelogram
Regular polygon
Circle
3-D Shapes
Types of solids
Prism
Pyramid
Cylinder
Cone
Sphere
Areas
Triangle
Square
Rectangle
Kyte and Rhombus
Trapezoid
Parallelogram
Regular polygon
Circe
Sector
Annulus
Segment
Regions between circles and squares
Surface area of Prisms
Surface area of Cylinders
Surface area of Pyramids
Surface area of a Cone
Surface area of Joined Solids
Volume
Volume of prisms
Volume of pyramids
Volume of cylinders
Volume of cones
Volume of spheres
Pythagorean Theorem
Pythagorean theorem
Proofs
Solve right angles (find hypotenuse)
Solve right angles (find missing legs)
Word problems
Space Diagonals
Converse of the Pythagorean Theorem
Pythagorean Triples
45-45-90 Triangles
Building Blocks
Point, Line and Plane
Line segment and ray
Congruent segments and midpoints
Midpoint
Parallel and skew lines
Parallel lines and planes
Angles
Complementary and supplementary angles
Using a protractor
Angle bisector
Polygons
Regular polygons
Concave and convex polygon
Congruent polygon
Vertex and diagonal
Perimeter
Parts of a circle
Concentric circles
Congruent circles
Geometry Transformations
Transformations and Isometries
Translations
Reflections
Rotations
Symmetry
- Reflectional symmetry
- Rotational symmetry
Enlargements (Dilations)
Parallel, coincident and intersepting lines
Distances in the plane
Between two points
From a point to a line
Between two lines
Lines in space
Lines in space
Intersection 2 lines
Plane in space
Planes in the Space
Line-Plane Intersection
Intersection of Two Planes
Intersection of Three Planes
Sheaf of Planes
Angles in the space
Line-Line angle
Line-Plane angle
Plane-Plane Angle
Exercises
Distances in the space
Point-Line Distance
Point-Plane Distance
Line-Line Distance
Plane-Plane Distance
Precalculus
Sequences and series
Introduction to sequences
Series and Summation Notation
Arithmethic sequences
Arithmetic series
Geometric sequences
Geometric series
Recursion Sequences
Graphs
Graphs
Definition of slope
Positive or negative slope
Determine the slope of a line
Equation of a line (slope-intercept form)
Equation of a line (point slope form)
Equation of a line from graph
Domain and range
Definitions
Polynomial function
Rational function
Radical function
Trigonometric function I
Trigonometric function II
Trigonometric function III
Quadratic function
Limits (approaches a constant)
Limits (approaches infinity)
Asymptotes
Continuity and discontinuities
Parallel, coincident and intersepting lines
Introduction to Functions
Seven Basic Functions
Limits
Limit of a function
Limits approaches a constant
Limits approaches infinity
Evaluating limits
One-Sided Limits
Continuity
Continuity
Discontinuities
Asymptotes
Vertical Asymptote
Horizontal Asymptote
Slant Asymptote
Trigonometry
Trigonometric ratios
Sine
Cosine
Tangent
The reciprocal trigonometric ratios
Cosecant
Secant
Cotangent
Elemento sin tÃtulo
Trigonometric ratios of related angles
Complementary angles
Supplementary angles
Angles that differ by 180º
Opposite angles
Trigonometric identities
Solving right angles
Two sides knowed
One side and one angle
Law of sines
Law of cosines
Domain of trigonometric functions
Statistics
Mean
Median
Mode
Quartiles
Deciles
Percentiles
Mean deviation
Variance
Standard Deviation
Coefficient of variation
Skewness
kurtosis
Frequency distribution
Previous concepts
Ungrouped data
Grouped data
Graphing statistics & Data
Bar chart
Histogram
Pie chart
Frequency Polygon
Pictogram
Cartogram
Factorial
Variations without repetition
Variations with repetition
Permutations without repetition
Permutation with repetition
Circular permutation
Binomial coefficient
Combinations without repetition
Combinations with repetition
Percents
Calculate the % of a number
Determine the %
Percentage increases
Percentage decreases
Calculate the initial capital
Return to www.emathematics.net
Percentages
Percentage decreases.
In a sale, there is a rack of trousers marked "All prices in this rack are reduced by 20%!".
The one I choose now had a price of £50. How much have I to pay now?
If 125 is reduced by 80% the result will be:
